Effects of Diffusion Barriers on the Growth and Field Emission Properties of Carbon Nanotubes Using Copper Catalyst
Copper is a good catalyst besides Fe, Co, Ni for carbon nanotubes (CNTs) growth in field emission display application , because the emission properties of as-grown CNTs on glass substrate afford low threshold field, high current density, and uniformity. Growing carbon nanotubes on glass substrate surface requires the formation of high-density catalyst nanoparticles. This, in turn, requires the minimum diffusion of catalyst into the substrate at the growth temperature for carbon nanotubes. In this work, four metals (W, Ni, Cr and Ti) as the diffusion barrier have been optimized and examined for growing carbon nanotubes on glass substrate. The bilayer films were annealed at 550℃ in hydrogen gas for few minutes to form nanoparticles to grow CNTs under the atmosphere of C2H2/H2 by chemical vapor deposition (CVD) method. With an optimized barrier layer (Ti, or W) , carbon nanotubes with excellent adhesion to the substrate and good field emission properties have also been achieved.
Carbon Nanotubes (CNTs) Field Emission Copper Diffusion Barrier
Lili Wang Yiwei Chen Ting Chen Tao Feng Zhuo Sun Wenxiu Que Zhejuan Zhang Lifeng Lin
Department of Physics; Engineering Research Center for Nanophotnics & Advanced Instrument, Ministry of Education; East China Normal University,North Zhongshan Rd. 3663, Shanghai 200062, China
国际会议
上海
英文
1777-1781
2007-03-12（万方平台首次上网日期，不代表论文的发表时间）